Kisii is a city in southwestern Kenya. It is the main urban and commercial center in the Gusii Highlands and the South Nyanza region. A vibrant town, the Kisii municipality has a population of about 200,000, according to 2012 estimates. It has a large dependent metropolitan population of over 100,000 residents, as per the latest national population and housing census of 2009. Kisii town is the capital of the Kisii County. It was the headquarters of the original and larger Kisii District before it was split to create Nyamira District (in the north) and Gucha District (in the south). With the new Kenya Constitution in August 27, 2010, Gucha District was re-absorbed back into Kisii County, whereas Nyamira District has been renamed Nyamira County.